Adjustable tool



J. F. SEMONES.

ADJUSTABLE TOOL.` APPLICATION FILED MAILS, 1920.'

1,385,477. I Patented July 26, 1921.`

Snom/Ito@ y kkozmuj UNITED STATES JOHN FREDERICK SEMONES, OF UNION CITY, TENNESSEE.

ADJUSTABLE Toor..

Specification of Letters Patent. Patentgd July 26|9 192.1.

Application nica Marcil s, 1920. seriai No. 364,349.l

T all w 710m. t may concern.'

Be it known that I, JOHN F. SEMoNEs, a citizen of the United States, residing at Union City, in the county of Obion and State of Tennessee, have invented certain new and useful Improvements in Adjustable Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains t0 make and use the same. l

This invention relates to certain improvements in instruments for taking the inside measurements of cylindrical devices or arf ticles with accuracy, and, further, to provide a tool of this character which may be set to different standards and made secure against inadvertent disarrangement ofthe adjustment while in use; also to provide for expanding or contracting said tool for the reception thereof by the cylinder, as con.- ditions may require.

The object of the invention is to carry out these purposes in a simple, effective and ready manner and with facility.

Further objects of the invention will be readily apparent from the following description of the construction and operation thereof.

The invention consists, therefore, of certain instrumentalities and structural features of the device, substantially asA hereinafter more fully disclosed and defined by the appended claims.

The accompanying drawings .illustrate the preferred embodiment of my invention or one form thereof, wherein it will be understood that various changes and modifications may be made as to the detail construction and arrangement of parts without departing from the spiritor scope thereof as embraced in the claims, and in which drawings Figure 1 is a longitudinal central sectlon of the invention.

Fig. 2 is a transverse section taken through the lower` end of the tool or device.

Fig. 3 is a detail enlarged sectional View showing more particularly the pins with their tapering ends engaging corresponding ends of the adjusting shaft member.

Fig. 4; is a sectional elevation of a modiiication thereof.

As' characteristic features ofmy invention, I employ a tubular member 1 within which is arranged a threaded shaft 2, threaded into the tubular member l in order to provide for they vertical adjustment of thershaft 5 for a purposeV presently made apparent. rlhe upper end of the shaft 2 has fixed thereon a lever or handle 2a for its convenient actuation, also threaded thereon is a ftailed7 jam or lockingnut 2l? for the effective retention of the shaft 5 against-inadvertent turning. The lower end of the screw shaft 2 also is tapered or pointed and adapted to engage the corresponding opposite ends of pins S arranged within addi? tional tubular members 9 secured yto the tubular member 1 and extending laterally therefrom. The tubular member 1, with its lateral tubular extensions 9, is adapted tor have pivotal movement for its convenient manipulation. Thelateral extensions' 9 are adapted to be received within sockets v10 within a cylindrical member 11, said cylindrical member being bisected or split vertically as at 12, in order tol provide, as the screw shaft 2 engages the pins 8,'to expand laterally for-carrying said split members into contact with the inner surface of the cylinder or bore of atubular member. The split cylindrical member is provided in its external surface or circumference with an annular groove 13 to receive a resilient member or spring 14 in order to provide for the automatic return of the sections of the split member to initial position. y

As shown in Fig. 4, in lieu of extending the shaft, primarily'used to expand the secl tions of the bisected cylindrical member 11, through the upper end of its inclosing tubular member 1, a plain or unthreaded shaft 2e may be substituted therefor, with the upper end thereof projecting into the closed tubular member 1, a spline and slotted like connection 3, 4 being provided therebetween to limit the movement of the shaft in the tubular member 1. The shaft 2C as employed in this case is actua-ted by a short threaded shaft 5 extending laterally through a screw-threaded passage 6 in the tubular member 1, the engagement between the shafts 5, 2C being effected, as the shaft 5 is actuated, through bevel-ended contacting portions thereof. The shaft 2c is held in fixed position by a jam or lock nut 7 applied to the threaded shaft 5 suitably equipped with a milled or ratchet head 5a for its convenient manipulation.

It will be seen from the foregoing that cal member ll whereby said sections are adapted, as above stated, to contact with the inner surface of a cylinder for ascertaining" the cross section thereof in order to provide for securing the true measurement ofv the inner walls of thencylinder, as will be readily appreciated. It will be readily understood that the measurements may be determined by the use of a micrometer or cal'- ipers of any approved style, by any artisan familiar with this art.v 1

Having thus described the invention, I claim: 1 Y

1. A device of thetype described, including a threaded shaft having la tapered end, a tubular member receiving said shaft and having lateral tubular extensions, said shaft having a movement longitudinally of said tubular member, pins arranged within said tubular extensions and provided with tapered endsadapted to be engaged by the tapered end of said shaft,.and a split cylindricaly member adapted vto be lexpanded by" said pins. 1

A device of the type described, including a threaded shaft having a tapered end,

atubular member receiving said shaft and having lateral tubular extensions, said shaft having a movementlongitudinall of said tubular member, pinsv arranged within said a tubular extensions and .provided with tapered ends adapted to be engaged by the tapered end of said shaft, said pins having a movementy atright angles to said shaft,

and a split cylindrical member adapted to bevexpanded by said pins.

dev1ce of the type described, including a threaded shaft havinga tapered end, a tubular member receiving said shaft and having lateral tubular extensions, said shaft having a movement-longitudinallyl of said tubular member, pins arranged within said tubular extensions and provided with tapered endsl adapted to be ,engaged by the tapered end of said shaft, said pins having a movement at right angles to said shaft,

asplit cylindrical member adapted to be expandedbysaid pins and provided with a resilient member adapted to provide for the automatic return of the sections of said split cylindrical member to initial position.

4. 'A device ofthe type described,'includ ing athreaded shaft having a tapered end, a tubular member receiving said shaft and having lateral tubular extensions, said shaft having a lmovement; longitudinally of said tubular member, pins arranged within said tubular extensions and provided withk tapered ends adapted to be engaged by the tapered end of said shaft, said pins having a movement atright'a'ngles to said shaft, a split cylindrical member adaptedV to be expanded bysaid pinsand provided with an annular groove, and a resilient member arranged within said groove for the contraction of said split cylindrical member.

5. A device of the type described, includl ing a lthreaded shaft having a tapered. end,

atubularmember receiving said shaft and having lateral tubular extensions, said shaft having a movement longitudinally of said tubular member, pins arranged within saidv tubular extensions and provided with tapered ends adapted to be engaged by the tapered end of said shaft, said pins having a movement at right angles to said shaft, a split cylindrical member adapted to be expanded by said pins, and a resilient member applied to said split cylindrical member for the automatic return of the latter' to initial position, said screw threaded-shaft engaging said tubular member and provided with a clamping. screwdfor locking it in place.

In testimony whereof, I aflix my signature.

JOHN FREDERICK SEMON ES'. 

